第一礼:删除时候弹出一个dialog界面的操作
第二礼:按返回键退出程序的dialog操作
第三礼:设置当天的零点时间。
第四礼:短信发送
第五礼:如何设置手机横屏
第六礼:手机的monkey测试
第七礼:防止手机休眠,保持手机背光常亮
第八礼:创建程序的快捷方式
第九礼:播放器中设置快捷键的操作
第十礼:获得当前系统sdk版本号的方法
第十一礼:获取软件当前的版本号
第十二礼:解析从服务器获得的数据 (pull解析器 , 解析xml)
第十三礼:Intent 开启一个activity (无参数)
第十四礼:判断SD卡是否可用
第十五礼:得到当前版本的SD卡的路径
第十六礼:获取SD ROM可用空间
第十七礼:获得ROM可用空间
第十八礼:获取RAM可用空间(Linux)
第十九礼:从网络上下载文件
第二十礼:下载apk后自动安装
第二十一礼:获取手机SIM卡串号
第二十二礼:Sharedpreference 偏好设置
第二十三礼:内容提供者 获取联系人姓名和电话 返回 infos对象
第二十四礼:对话框的使用
第二十五礼:异步任务
第二十六礼:移动图片的动画效果(从左到右移出)
第二十七礼:进度条
第二十八礼:递归删除文件及文件夹
第二十九礼:过滤掉其他的播放器,使用我自己的播放器来做
第三十礼:怎么检测一个应用是否安装
精彩即将呈现:
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代码如下:
// 弹出来一个删除确认的 dialog AlertDialog.Builder builder = new AlertDialog.Builder( ConversationActivity.this); builder.setTitle(R.string.delete); builder.setIcon(android.R.drawable.ic_dialog_alert); builder.setMessage(R.string.delete_info); // 确定 builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { pd = new ProgressDialog( ConversationActivity.this); pd.setTitle(R.string.delete); pd.setIcon(android.R.drawable.ic_dialog_alert); pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); pd.setMax(itemSelected.size()); pd.setButton(getString(android.R.string.cancel), new DialogInterface.OnClickListener() { @Override public void onClick( DialogInterface dialog, int which) { // 终止信息删除 isDelete = false; } }); pd.setOnDismissListener(new DialogInterface.OnDismissListener() { public void onDismiss(DialogInterface dialog) { changeMode(DISPLAYMODE.list); } }); pd.show();
按返回键退出程序的操作。
public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(R.string.exit_title); builder.setMessage(R.string.exit_msg); builder.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { finish(); } }); builder.setNegativeButton(R.string.cancel, null); builder.show(); return true; } return super.onKeyDown(keyCode, event); @Override public void onDestroy() { System.exit(0); } }
Time time = new Time();//得到当前时间,把当前时间都设置为0 time.setToNow(); time.hour = 0; time.minute = 0; time.second = 0; // false 时间 true 日期 把时间设置为毫秒值 long fristSecondOfToday = time.toMillis(false);
//取得短信电话号码 内容 String number = actv_enter_number.getText().toString(); String body = et_enter_msg_content.getText().toString(); SmsManager smsManager = SmsManager.getDefault(); ArrayListparts = smsManager.divideMessage(body); for(String part : parts){ smsManager.sendTextMessage(number, null, part, null, null); Uri url = Sms.Sent.CONTENT_URI; ContentValues values = new ContentValues(); values.put("address", number); values.put("body", part); getContentResolver().insert(url, values); }
在清单文件中加入如下代码:
1.使用第一个命令链接设备
2.使用第二个命令 后面的数字代表2000
// 保持背光常亮的设置 getWindow().setFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON, WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
第一种方法:
使用首选项来存储快捷方式的boolean值如果存在就设置为true,不存在就设置为false
直接上代码
if(preference!=null){ boolean isExit = preference.getBoolean("shortcut", false); if(preference!=null&&!isExit){ createShortCut(); SharedPreferences.Editor editor = preference.edit(); if(editor != null){ editor.putBoolean("shortcut", true); editor.commit(); } }
public void createShortCut(){ try{ //创建快捷方式的Intent Intent shortcutintent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT"); //不允许重复创建 shortcutintent.putExtra("duplicate", false); //需要现实的名称 shortcutintent.putExtra(Intent.EXTRA_SHORTCUT_NAME, getString(R.string.app_name)); //快捷图片 Parcelable icon = Intent.ShortcutIconResource.fromContext(getApplicationContext(), R.drawable.icon); shortcutintent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, icon); //点击快捷图片,运行的程序主入口 shortcutintent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, new Intent(getApplicationContext() , LoginActivity.class)); //发送广播。OK sendBroadcast(shortcutintent); }catch (Exception e) { closeWindow(); } }
第二种方法:
自己看吧,相信你能够看懂
去系统的lacunch数据库中查找,查找有没有跟我当前应用名字一样的快捷方式,如果有的话,就说明已经存在。
private void createShortCut() { // TODO Auto-generated method stub //先判断该快捷是否存在 if(!isExist()){ Intent intent = new Intent(); //指定动作名称 intent.setAction("com.android.launcher.action.INSTALL_SHORTCUT"); //指定快捷方式的图标 Parcelable icon = Intent.ShortcutIconResource.fromContext(this, R.drawable.congsmall); intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, icon); //指定快捷方式的名称 intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, "短信管理器"); //指定快捷图标激活哪个activity Intent i = new Intent(); i.setAction(Intent.ACTION_MAIN); i.addCategory(Intent.CATEGORY_LAUNCHER); ComponentName component = new ComponentName(this, MainActivity.class); i.setComponent(component); intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, i); sendBroadcast(intent); } }
private boolean isExist(){ boolean isExist = false; int version = getSdkVersion(); Uri uri = null; if(version < 2.0){ uri = Uri.parse("content://com.android.launcher.settings/favorites"); }else{ uri = Uri.parse("content://com.android.launcher2.settings/favorites"); } String selection = " title = ?"; String[] selectionArgs = new String[]{"短信管理器"}; Cursor c = getContentResolver().query(uri, null, selection, selectionArgs, null); if(c.getCount() > 0){ isExist = true; } c.close(); return isExist; }
这个可是核心操作,大家可要好好看看哦
/** * 设置键盘快捷键 */ public void setKeyBoardShortcut() { //B表示下一首歌曲 KeyStroke nextStroke = KeyStroke.getKeyStroke(KeyEvent.VK_B, 0, true); //空格表示播放和暂停 KeyStroke pauseStroke = KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0, true); //C表示播放 KeyStroke playStroke = KeyStroke.getKeyStroke(KeyEvent.VK_C, 0, true); //V表示停止 KeyStroke stopStroke = KeyStroke.getKeyStroke(KeyEvent.VK_V, 0, true); //三个快捷键,显示三个窗体 KeyStroke eqStroke = KeyStroke.getKeyStroke(KeyEvent.VK_F3, 0, true); KeyStroke plStroke = KeyStroke.getKeyStroke(KeyEvent.VK_F4, 0, true); KeyStroke lrcStroke = KeyStroke.getKeyStroke(KeyEvent.VK_F2, 0, true); String nextID = "NEXT"; String pauseID = "PAUSE"; String playID = "PLAY"; String stopID = "STOP"; String eqID = "EQ"; String plID = "PL"; String lrcID = "LRC"; Action nextAction = new AbstractAction() { public void actionPerformed(ActionEvent e) { if (mp != null) { mp.processNext(e.getModifiers()); } } }; Action pauseAction = new AbstractAction() { public void actionPerformed(ActionEvent e) { if (mp != null) { mp.processPause(e.getModifiers()); } } }; Action playAction = new AbstractAction() { public void actionPerformed(ActionEvent e) { if (mp != null) { mp.processPlay(e.getModifiers()); } } }; Action stopAction = new AbstractAction() { public void actionPerformed(ActionEvent e) { if (mp != null) { mp.processStop(e.getModifiers()); } } }; Action lrcAction = new AbstractAction() { public void actionPerformed(ActionEvent ae) { // toggleLyricWindow(!lrcWin.isShowing()); mp.lrc.doClick(); } }; Action eqAction = new AbstractAction() { public void actionPerformed(ActionEvent ae) { // toggleEqualizer(!eqWin.isShowing()); mp.eq.doClick(); } }; Action plAction = new AbstractAction() { public void actionPerformed(ActionEvent ae) { // togglePlaylist(!plWin.isShowing()); mp.pl.doClick(); } }; setKeyboardAction(nextID, nextStroke, nextAction); setKeyboardAction(pauseID, pauseStroke, pauseAction); setKeyboardAction(playID, playStroke, playAction); setKeyboardAction(stopID, stopStroke, stopAction); setKeyboardAction(lrcID, lrcStroke, lrcAction); setKeyboardAction(eqID, eqStroke, eqAction); setKeyboardAction(plID, plStroke, plAction); } public void setKeyboardAction(String id, KeyStroke key, Action action) { mp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, id); mp.getActionMap().put(id, action); mp.getPlaylistUI().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, id); mp.getPlaylistUI().getActionMap().put(id, action); mp.getEqualizerUI().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, id); mp.getEqualizerUI().getActionMap().put(id, action); mp.getLyricUI().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, id); mp.getLyricUI().getActionMap().put(id, action); }
/** * 得到当前系统sdk版本 * @return */ private int getSdkVersion(){ return android.os.Build.VERSION.SDK_INT; }
// 获取手机系统的包管理器 PackageManager pm = getPackageManager(); PackageInfo pkinfo=pm.getPackageInfo(getPackageName(),0); return pkinfo.versionName;
public class UpdateInfoParser { /** * 获取服务器上的更新信息 * @param is 服务器更新信息的返回的流 * @return UpdateInfo 封装的更新信息 */ public static UpdateInfo getUpdateInfo(InputStream is) { XmlPullParser parser = Xml.newPullParser(); parser.setInput(is, "UTF-8"); int type = parser.getEventType(); UpdateInfo info = null; while(type!=XmlPullParser.END_DOCUMENT){ switch (type) { case XmlPullParser.START_TAG: String tagname = parser.getName(); if("info".equals(tagname)){ info = new UpdateInfo(); }else if("version".equals(tagname)){ String version = parser.nextText(); info.setVersion(version); } break;} type = parser.next();} return info;
Intent intent = new Intent(this, MainActivity.class); startActivity(intent); finish(); // 关闭当前的界面
if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED))
Environment.getExternalStorageDirectory()
private String getSize() { //得到ROM剩余空间 File path = Environment.getDataDirectory(); //得到SD卡剩余空间 // Environment.getExternalStorageDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long availableBlocks = stat.getAvailableBlocks(); long availsize = availableBlocks * blockSize; String size = Formatter.formatFileSize(this, availsize); return size; }
/** * 获取手机的剩余可用ROM */ public static long getAvailableMem(Context context){ ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); MemoryInfo outInfo = new MemoryInfo(); am.getMemoryInfo(outInfo); long availMem = outInfo.availMem; return availMem; }
public static long getTotalRamSize(){ File file = new File("/proc/meminfo"); FileInputStream fis = new FileInputStream(file); BufferedReader br = new BufferedReader(new InputStreamReader(fis)); String result = br.readLine(); StringBuffer sb = new StringBuffer(); for(char c: result.toCharArray()){ if(c>='0'&&c<='9'){ sb.append(c); } } return Integer.parseInt(sb.toString())*1024; } // 有异常 catch
URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod("GET"); // conn.setConnectTimeout(5000); // 超时时间 int code = conn.getResponseCode(); // 状态码 if (code == 200) { InputStream is = conn.getInputStream(); }
/** * 安装下载完成的APK * @param savedFile */ private void installAPK(File savedFile) { //调用系统的安装方法 Intent intent=new Intent(); intent.setAction(intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(savedFile), "application/vnd.android.package-archive"); startActivity(intent); finish(); }
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
String sim = tm.getSimSerialNumber();
private SharedPreferences sp; sp = getSharedPreferences("config", MODE_PRIVATE); // 向偏好设置内添加数据 Editor editor = sp.edit(); editor.putBoolean("update", false); editor.commit(); // 从偏好设置内提取数据 sp.getBoolean ("update", false);
public static ListgetContactInfo(Context context) { List infos = new ArrayList (); Uri uri = Uri.parse("content://com.android.contacts/raw_contacts"); Uri datauri = Uri.parse("content://com.android.contacts/data"); Cursor cursor = context.getContentResolver() .query(uri, null, null,null, null); while (cursor.moveToNext()) { String id = cursor.getString((cursor.getColumnIndex("contact_id"))); // 根据上面的ID查询联系人的 信息 ContactInfo info = new ContactInfo(); Cursor datacursor = context.getContentResolver().query(datauri,null, "raw_contact_id=?", new String[] { id }, null); while (datacursor.moveToNext()) { String data1 = datacursor.getString(cursor.getColumnIndex("data1")); String mimetype = datacursor.getString(cursor.getColumnIndex("mimetype")); if ("vnd.android.cursor.item/phone_v2".equals(mimetype)) { info.setNumber(data1); } if ("vnd.android.cursor.item/name".equals(mimetype)) { info.setName(data1); } } datacursor.close(); infos.add(info); } cursor.close(); return infos; }
private void showNormalEntryDialog() { AlertDialog.Builder builder = new Builder(this); // 按键盘上的取消 回到主界面 builder.setOnCancelListener(new OnCancelListener() { public void onCancel(DialogInterface dialog) { Intent intent = new Intent(getApplicationContext(), MainActivity.class); startActivity(intent); finish(); }}); View view = View.inflate(this, R.layout. dialog, null); bt_ok = (Button) view.findViewById(R.id.bt_ok); bt_ok.setOnClickListener(this); dialog = builder.create(); dialog.setView(view, 0, 0, 0, 0); dialog.show(); }
new AsyncTask() { @Override protected Void doInBackground(Void... params) { // 异步任务运行时执行 return null; } @Override protected void onPreExecute() { //异步任务运行前执行 可以放置进度条 progressbar等 super.onPreExecute(); } @Override protected void onPostExecute(Void result) { //异步任务运行结束后执行 super.onPostExecute(result); } }.execute();
TranslateAnimation ta = new TranslateAnimation( Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 1.0f, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0); ta.setDuration(200); view.startAnimation(ta);
ProgressDialog pd; pd = new ProgressDialog(this); pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); pd.setTitle("标题"); pd.setMessage("进度条正文"); pd.show();
public static void delete(File file) { if (file.isFile()) { file.delete(); return; } if(file.isDirectory()){ File[] childFiles = file.listFiles(); if (childFiles == null || childFiles.length == 0) { file.delete(); return; } for (int i = 0; i < childFiles.length; i++) { delete(childFiles[i]); } file.delete(); }}
//过滤调用第三方浏览器。并且解析视频网站播放地址,传给播放器 wv.setWebViewClient(new WebViewClient() { public boolean shouldOverrideUrlLoading(final WebView view, final String url) { if (url.contains("3gp") || url.contains("mp4")) {//http://113.31.34.14:80/work/500/152/283/484/500.20120913082849.3gp loadurl(view, url, true);//载入视频 } else { loadurl(view, url, false);// 载入网页 } // http://113.31.34.15:80/work/500/094/076/171/500.20120716165645.3gp return true; }// 重写点击动作,用webview载入 });
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//检查某个应用是否安装 public static boolean checkAPP(Context context, String packageName) { if (packageName == null || "".equals(packageName)) return false; try { ApplicationInfo info = context.getPackageManager() .getApplicationInfo(packageName, PackageManager.GET_UNINSTALLED_PACKAGES); return true; } catch (NameNotFoundException e) { return false; } }